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A proposed simplified version of Graf’s classification based on alpha angle only for quicker interpretation of hip subtype
| Type I | Normal | Alpha angle >60° |
| Type II | a, b, c | Alpha angle 43°–60° |
| Type III | Alpha angle < 43° | |
| Type IV | Dislocated |
Note: Beta angle is useful in distinguishing Sub-type II—55°–77° is normal
